Lubricating system for planers



G. E. GREENLEAF.

LUBRICATING SYSTEM FOR PLANERS.

APPLICATION FILED MAR. 3, 1919.

Patented Aug; 24, 41920.

2 SHEETS-SHEET l. Q4

fmI-

G. E. GREENLEAF.

LUBRICATING SYSTEM FOR PLANERS.

APPLICATION FILED MAR-3,1919.

Qs im l /A mm Patented Aug. 24, 1920.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

GEORGE E. GREENLEAF, 0F PLAINFIELD, NEW JERSEY, ASSIGNOR TONILES-BEMENT- POND COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEWJERSEY.

LUBRICATING SYSTEM FOR PLANERS.

Specification of Letters Patent.

Patented Aug. 24, 1920.

Application led vMarch 3, 1919. Serial No. 280,488.

To all lwhom it may concern:

Be it known that I, GEORGE E. GREEN- LEAF, a citizen of the UnitedStates, residing at Plainfield, in the county of Union and State of NewJersey, have invented certain new and useful Improvements in LubricatingSystems for Planers, of which the following is a specification.

The object of the invention is to provide a simple forced feedlubricating systemv removed as are also the arch, the cross rail,

the tool heads and associated parts.

Fig. 2 is a sectional view taken along the line 2 2 of Fig. 1. In thisview the table is shown in place.

Fig. 3 is an enlarged horizontal sectional view showing the pumpplunger, the view being taken along the line 3--3 of Fig.' 2.

Fig. 4 is a vertical sectional vlew taken along the line 4-4 of Fig. 3.

,Figa 5 is a plan view similar to Fig. 1 but showing an alternateconstruction.

Fig. 6 is a sectional view taken along the lin'e 6-6 of Fig. 5. In thisview the table is shown in place.

Fig. 7 is an enlarged horizontal sectional view showing the pumpplunger, the view being taken along the line 7-7 of Fig. 6.

Of the drawings, 1 represents a planer bedprovided with ways or bearingsurfaces 2 and 3 along which the table 4 is adapted to reciprocate inthe usual manner. At the sides of the bed 1 are housings 5, 5 whichcarry the cross rail and other parts, which are not shown as theyconstitute no part of the present invention.

For driving the table back and forth along the bed there is providedsuitable gearing mounted on the bed below the table. For operating thegearing I have shown an electric motor 6 which is connected with atransverse horizontal shaft 7. n Mounted at the inner end of the shaft 7is-a pinion 8 meshing with a gear 9 on a transverse shaft 10. Mounted onthe shaft 10 is a pinion 11 meshing with a gear 12 on a transverse shaft13.v Mounted on the yshaft 13 is a pinion 14 I meshing with a gear 15 ona transverse shaft 16. The gear 15 meshes with a rack 17 secured to thebottom of the table and extending longitudinally thereof. Suitablecontrol mechanism is provided for rotatin the motor first in onedirection and then 1n the other, and it will be seen that the motor,through the gearing which has been described, serves to drive the tablealternately forward and backward.

The ways or bearing surfaces 2 and 3 o n which the table slides .must beproperly lubricated, and it is to the mechanism for effecting thislubrication that my resent invention particularly relates. Asillustrated, there is provided an oil reservoir 18 from which oil isdrawn'by means of a suitable to distribute the oil from the said oilholes.

over the entirebearing surfaces. At the ends of the bearing surfaces arerecesses 23, 23 and 24, 24" in which surplus oil is collected. Fromthese recesses the oil drains back through pipesv 25, 25 to thereservoir 18.

The pump is shown in detail in Figs. 3v and 4. It comprises a bracket 26suitably mounted as for instance on one of the housings 5. A part of thebracket 26 is shaped to provide a cylinder 27 in which a plunger 28 ismounted for reciprocation. At 29 the bracket is rovided with anarm whichengages the ront end of the plunger for supporting and guiding it. Astuffing box 30 is provided for making a tight joint between the lungerand the cylinder.

ounted partly in the bracket 26 and partly in bearings on the bed is atransverse rotatable shaft 31. This shaft carries at its inner end agear 32 'which meshes with one of the gears of the main drive gearing,in this case the pinion 11. It will be seen that the construction issuch that the shaft 31 will be rotated whenever the planer is inoperation, the shaft turning first in one disusv charge pipes or at thebearing surfaces. Ex-

the reservoir 18. A ball check valve 36 is provided at the end of thepipe. At 37v is a discharge outlet which communicates with thepipe 20. Aball check valve 38 is provided at the entrance to the pipe. The thirdopening is indicated at 39 and this communicates with a by-pass pipe 40which leads to the reservoir 18. A ball check valve 41 is provided atthe entrance to the pipe 40, this valve being normally held closed by aspring 42 so that it can open only when the pressure in the cylinderexceeds the predetermined amount.

It will be seen thatwhen the plunger is in operation the shaft'31 willrotate first in one direction and then in the other and that for eachdirection of rotation the shaft will reciprocate the plunger 28. As-theplunger moves toward the front the check valves v38 and 41 willremainclosed and oil will be sucked into the cylinder through the pipe19,

the check valve 36 automatically opening.

valve 38 opens, permitting the voil to flow into the plpe 20 and thencethrough the apertures 21 and 22 to the bearing surfaces. If the pressure.in the pipe 20 rises above a predetermined amount, the check valve 41Will open and permit a, part of the oil to flow through the pipe` 40back to the reser- Voir.

It will be observed that my improved construction includes a `by-passconnection which extends directly from the pump cylinder back to the oilreservoir. In this way I, avoid any excessive pressure in the discess.oil -is permitted to flow directly back from the pump cylinder to thereservoir without entering the main discharge pipes.

Under some circumstances it is desirable to provide an automaticlubricating system for the various shaft bearings and for the gearswhich is independent of the lubricating system for the Ways or bearingsurfaces on the bed. ,The oil which is supplied to the ways becomesdirty quite rapidly as the ways are exposed to the atmosphere andreceive a considerable amount of'dust, metal chips, etc. The bearingsand gears are protected and the oil which is supplied to them can bekept. relatively clean. 'It is therefore desirable to provide twoseparate bodies of oil which circulate independently of each other.

for planers.

already described except that the bracket 26' is shaped to provide twoopposite cylinders 27 and 27a in which` the plunger 2 8 recipro- Cates.,The cylinder 27*l is provided with an aperture at its end to permit theinsertion of the lun er. This aperture is then closed by a p ug Exceptfor the plug 27b the construction of the cylinder 27a and of the severalapertures and valves is the same'as that already described.

A. pipe 43 leads from the discharge outlet of the cylinder 27" and isprovided with branches 44 which extend to the several bearings for theshafts 7, 10, 13 and 16. The pipe 43 also has other branches 45 whichare adapted to lead oil directly to the teeth of the several'gears.Arranged below the gears and the bearings is a drip pan or reservoir 46to which surplus oil is returned from the bearings and gears. A suctionpipe 47 leads from the reservoir 46 to the inlet of thepump cylinder 27.Leading from the pump cylinder 27a back tothe reservoir 46 is a bypasspipe 48 which serves to permit surplus oil not required for lubricationto be returned to the reservoir 46.

It will be seen that by providing the two reservoirs 18 and 46 and byproviding separate pump cylinders'and piping, the bodies of oil for theWays and for the shaft bearings'and gears are kept separate from eachother. v

It will be seen that by my invention I have provided a simplelubricating system which requires very little attention on the part ofthe operator. Lubrication starts instantly upon the starting 'ol theplaner table and stops instantly upon the stopping of the planer table.The peculiar pump construction which I have provided enables me to makeuse of the main planer driving mechanism for driving the pumpnotwithstanding the fact that this driving mechanism reverses. Prior tomy invention conproviding forced feed lubricating systems Inasmuch asthe main drive mechanism reverses, it was not possible to utilize it fordrivin a .rotary oil pump such as is commonly use for machine tools; For

this reason a separate electric motor has ,frequently been provided fordriving the oil pump and this has involved considerableexlsiderabledifficulty has been experienced in? one hand and to avoid deficientlubrication on the other hand, the motor had to be stopped and startedeach time the operation of the planer was stopped and started. Thisnecessitated either very close attention on the part of the operator orthe use of special connections whereby the motor was started and stoppedautomatically. As before stated all ofrthese diiiiculties andcomplexities are, avoided by my improved system.

What I claim is:

1. The combination in a planer of a bed, a reciprocating table slid-ableon the bed,

'gearing and shafting for driving and reversing the table, a bracket atone side of the bed, a lubricating system comprising a plunger pumpmounted on the bracket, piping leading from the pump to the bearingsurfaces of the planer, a pump operating shaft connecting with thereversing table drive gearing and extending through the side of the bedto the bracket, and mechanism interposed between the operating shaft andthe pump for operating the pump during rotation of the shaft ineachdirection.

2. The combination with a planer bed, a reciprocating table on the bedand reversing gearing for driving the table, of a lubricating systemcomprising a plunger pump, piping leading from the pump to the ways orbearing surfaces on the bed,la' pump operating shaft'connected with thetable drive gearing and reversing when the gearing reverses. two spacedrollers on the plunger, and an eccentric on the operating shaft betweenthe rollers whereby the plunger is reciprocated when the shaft is turnedin either direction.

3. The combination with a planer bed, a reciprocating table on the bedand reversing gearing for driving the table, of a lubricating systemcomprising a reservoir, a plunger pump, a pipe leading from thereservoir to the pump cylinder, piping leading from the outlet of thepump cylinder to the ways or bearing surfaces on the bed. a pumpoperating shaft connected with the table drive gearing and reversingwhen the gear- .ing reverses, mechanism interposed between the shaft andthe pump for operating the pump during rotation of the shaft in eachdirection. and means for relieving the pressure in the pump should suchpressure exceed a predetermined amount.

4. The combination in a planer of a bed, a reciprocating table slidableon the bed, gearing and shafting for driving and reversing the table. alubricating system comprising a plunger pump, piping leading from thepump to the bearing surfaces of the gearing and shafting, a pumpoperating shaft, a gear on the shaft meshing with a gear of the saiddrive gearing whereby the shaft is driven alternately in oppositedirections, .and mechanism interposed between the operating shaft andthe pump for operating the pump during rotation of the shaft in eachdirection. y

5. The combination in a planer of a bed, a reciprocating table slidableon the bed, gearing and shafting for driving and reversing the table, alubricating system comprising a plunger pump cylinder, piping leadingfrom the pump cylinder to the bearing surfaces of the planer, a secondplunger pump cylinder, piping leading from the second pump cylinder tothe bearing surfaces of the gearing and shafting, and a single shaftdriven by the reversing table drive gearing for operating the p ungersin the said cylinders.

6. The combination with a planer bed, a reciprocating table on the bedand gearing and shafting for driving and reversing the table, of alubricating system comprising a double-ended plunger pump, pipingleading from one end of the pump to the Ways or bearing surfaces on thebed, other piping independent of the first piping leading from the otherend of the pump to the 'bearing surfaces of the gearing and shafting, apump operating shaft connected with the table drive gearingand'reversing when the gearing reverses, and mechanism interposedbetween the operating shaft and the pump for operating the pump duringrotation of the shaft in each direction.

7. The combination with a planer bed, a reciprocating table on the bed'and gearing and shafting for driving and reversing the table, of alubricating system comprising a double-ended plunger pump, pipingleading from one end of the pump to the Ways or bearing surfaces on thebed, other pi ing independent of the first piping leading rom the otherend of the pump to the bearing surfaces of the gearing and shafting, apump operating shaft connected with the table driv'e gearing andreversing when the gearing reverses, mechanism interposed between theoperating shaft and the pump for operating the pump during rotation ofthe shaft in each direction. independent reservoirs for receivinglubricant from thebearing surfaces on the bed and from the gearing andshafting respectively, and independent pipes leading respectively fromthe said reservoirs to the corresponding ends of the pump.

In testimony whereof, I hereto aix my signature.

GEORGE E. GREENLEAF.

